Another process that determines the post-merger evolution is angular momentum loss through the magnetic dipole radiation torque. This timescale might set the MED time in the CD scenario (e.g., [1]}) and in the DD scenario (e.g., [2]}). Several parameters determine the angular momentum loss timescale. Some of them are more secure, like the moment of inertia of the WD. Assuming that the merger remnant is rapidly rotating and has a mass of \(\simeq 1.4 M_\odot \) , there are two undetermined parameters that influence the angular momentum loss timescale the most. These are the dipole magnetic field of the remnant \(B\) , and
the angle between the magnetic axis and the rotation axis of the WD remnant, \(\delta \) . The angular momentum loss timescale dependence on these two parameters is (for more details see [1]} and [2]})
\(\begin{split}\tau _{\rm B} \approx 10^{4}\left(\frac{B}{10^9 {~\rm G}}\right)^{-2}\sin ^2 \delta {~\rm yr}.\end{split}\) 
